Analog Devices Inc. LTC2325HUKG-14#TRPBF

Overview

LTC2325HUKG-14#TRPBF from Analog Devices (formerly Linear Technology) is a quad, 14-bit + sign successive approximation register (SAR) analog-to-digital converter with simultaneous sampling, differential inputs, and 5 Msps per channel throughput. It operates from a single 3.3 V or 5 V supply, delivers 81 dB SNR at 2.2 MHz input, ±1 LSB INL typical, and features an internal 4.096 V temperature-compensated reference. It is used in high-speed data acquisition systems requiring precise phase-coherent sampling across four channels.

For engineers reviewing the LTC2325HUKG-14#TRPBF datasheet, LTC2325HUKG-14#TRPBF pinout, LTC2325HUKG-14#TRPBF application, or LTC2325HUKG-14#TRPBF equivalent, key selection considerations include guaranteed 14-bit no-missing-codes performance over –40°C to 125°C, LVDS/CMOS dual-mode serial interface, 52-lead QFN package with exposed thermal pad, and integrated reference buffer enable/disable control via REFBUFEN.

Technical Context

The LTC2325HUKG-14#TRPBF implements four independent SAR ADC cores sharing a common timing architecture to ensure true simultaneous sampling with aperture delay matching ≤500 ps. Its differential input stage supports 8 V_P-P full-scale range and >102 dB common-mode rejection at 2.2 MHz.

It integrates a low-drift (≤20 ppm/°C) 4.096 V reference buffer per channel, configurable via REFBUFEN, and supports both SDR and DDR serial readout modes with CMOS or LVDS I/O-selectable by CMOS/LVDS and SDR/DDR pins-with CLKOUT provided for skew-matched data capture.

Key Specifications

Pinout & Package

The LTC2325HUKG-14#TRPBF is housed in a 52-lead plastic QFN package (7 mm × 8 mm) with exposed thermal pad (Pin 53), requiring soldering to PCB ground for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad SAR ADC applications.

Compared with AD7606C-16 and ADS8684, the LTC2325HUKG-14#TRPBF uniquely combines 5 Msps simultaneous sampling, integrated 4.096 V reference, LVDS/CMOS flexibility, and extended temperature range - making it optimal for high-fidelity, phase-critical, thermally demanding DAQ systems.

Availability

LTC2325HUKG-14#TRPBF is available at Aetrix Electronics and suitable for high-speed motor control, optical network monitoring, and industrial data acquisition requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for LTC2325HUKG-14#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.

The LTC2325HUKG-14#TRPBF belongs to ADI's high-speed precision SAR ADC product line, designed specifically for applications demanding simultaneous multi-channel sampling, low noise, and robust operation in harsh thermal environments.

FAQ

What is the maximum operating temperature rating for the LTC2325HUKG-14#TRPBF?

The LTC2325HUKG-14#TRPBF is rated for operation from –40°C to +125°C, meeting the H-grade specification. This extended temperature range is validated per the Absolute Maximum Ratings table and applies across all electrical specifications unless otherwise noted, making it suitable for under-hood automotive and industrial edge computing deployments where ambient temperatures exceed 105°C.

Does the LTC2325HUKG-14#TRPBF require an external reference, or does it include an internal one?

The LTC2325HUKG-14#TRPBF includes an internal temperature-compensated 4.096 V reference buffer on each of its four REFOUT pins (REFOUT1–4), with drift ≤20 ppm/°C. The internal buffers are enabled by default when REFBUFEN is tied to VDD. To use an external reference, ground REFBUFEN and drive REFOUT1–4 with a 1.25 V to 5 V source - the LTC2325HUKG-14#TRPBF supports both configurations without hardware modification.

How does the LTC2325HUKG-14#TRPBF achieve simultaneous sampling across all four channels?

The LTC2325HUKG-14#TRPBF achieves true simultaneous sampling using a shared sample-and-hold (S/H) architecture across all four ADC cores, triggered by a single CNV pulse. Its aperture delay matching is guaranteed ≤500 ps, ensuring phase coherence between channels. This architecture eliminates inter-channel skew inherent in multiplexed or independently clocked converters, which is essential for vector control and power quality analysis.

Can the LTC2325HUKG-14#TRPBF interface directly with an FPGA using LVDS signaling?

Yes - the LTC2325HUKG-14#TRPBF supports native LVDS I/O mode. When CMOS/LVDS is tied to OVDD, pins SDOA± through SDOD± and CLKOUT± become fully compliant LVDS drivers, requiring only 100 Ω differential termination at the FPGA receiver. The device supports both SDR and DDR modes, and CLKOUT provides a skew-matched clock to simplify timing closure in high-speed FPGA designs.

What power-saving modes does the LTC2325HUKG-14#TRPBF support, and how much power do they consume?

The LTC2325HUKG-14#TRPBF supports Nap Mode (6.4 mA total supply current) and Sleep Mode (20 µA total supply current), both entered via dedicated control sequences. In Nap Mode, the ADC cores remain powered but conversions are halted; in Sleep Mode, most internal circuitry is shut down. These modes reduce power dissipation to 21.1 mW (Nap) or 288 µW (Sleep) at 5 V supply - enabling energy-efficient burst-mode acquisition in portable or thermally constrained systems.